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Spinocerebellar ataxia type 29(SCA29)

MedGen UID:
350085
Concept ID:
C1861732
Disease or Syndrome
Synonyms: Cerebellar ataxia early-onset nonprogressive; CEREBELLAR ATAXIA, CONGENITAL NONPROGRESSIVE, AUTOSOMAL DOMINANT; SCA29; Spinocerebellar ataxia 29, congenital nonprogressive
SNOMED CT: Spinocerebellar ataxia type 29 (715825009); Congenital nonprogressive spinocerebellar ataxia (715825009)
Modes of inheritance:
Autosomal recessive inheritance
MedGen UID:
141025
Concept ID:
C0441748
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in individuals with two pathogenic alleles, either homozygotes (two copies of the same mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele).
Autosomal dominant inheritance
MedGen UID:
141047
Concept ID:
C0443147
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele.
 
Gene (location): ITPR1 (3p26.1)
 
Monarch Initiative: MONDO:0007298
OMIM®: 117360
Orphanet: ORPHA208513

Definition

Spinocerebellar ataxia-29 (SCA29) is an autosomal dominant neurologic disorder characterized by onset in infancy of delayed motor development and mild cognitive delay. Affected individuals develop a very slowly progressive or nonprogressive gait and limb ataxia associated with cerebellar atrophy on brain imaging. Additional variable features include nystagmus, dysarthria, and tremor (summary by Huang et al., 2012). For a general discussion of autosomal dominant spinocerebellar ataxia, see SCA1 (164400). [from OMIM]

Clinical features

From HPO
Dysarthria
MedGen UID:
8510
Concept ID:
C0013362
Mental or Behavioral Dysfunction
Dysarthric speech is a general description referring to a neurological speech disorder characterized by poor articulation. Depending on the involved neurological structures, dysarthria may be further classified as spastic, flaccid, ataxic, hyperkinetic and hypokinetic, or mixed.
Intellectual disability, mild
MedGen UID:
10044
Concept ID:
C0026106
Mental or Behavioral Dysfunction
Mild intellectual disability is defined as an intelligence quotient (IQ) in the range of 50-69.
Dysmetria
MedGen UID:
68583
Concept ID:
C0234162
Finding
A type of ataxia characterized by the inability to carry out movements with the correct range and motion across the plane of more than one joint related to incorrect estimation of the distances required for targeted movements.
Dysdiadochokinesis
MedGen UID:
115975
Concept ID:
C0234979
Sign or Symptom
A type of ataxia characterized by the impairment of the ability to perform rapidly alternating movements, such as pronating and supinating his or her hand on the dorsum of the other hand as rapidly as possible.
Delayed ability to walk
MedGen UID:
66034
Concept ID:
C0241726
Finding
A failure to achieve the ability to walk at an appropriate developmental stage. Most children learn to walk in a series of stages, and learn to walk short distances independently between 12 and 15 months.
Focal impaired awareness seizure
MedGen UID:
543022
Concept ID:
C0270834
Disease or Syndrome
Focal impaired awareness seizure (or focal seizure with impaired or lost awareness) is a type of focal-onset seizure characterized by some degree (which may be partial) of impairment of the person's awareness of themselves or their surroundings at any point during the seizure.
Delayed speech and language development
MedGen UID:
105318
Concept ID:
C0454644
Finding
A degree of language development that is significantly below the norm for a child of a specified age.
Global developmental delay
MedGen UID:
107838
Concept ID:
C0557874
Finding
A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.
Cerebellar vermis atrophy
MedGen UID:
149271
Concept ID:
C0742028
Disease or Syndrome
Wasting (atrophy) of the vermis of cerebellum.
Limb ataxia
MedGen UID:
196692
Concept ID:
C0750937
Finding
A kind of ataxia that affects movements of the extremities.
Gait ataxia
MedGen UID:
155642
Concept ID:
C0751837
Sign or Symptom
A type of ataxia characterized by the impairment of the ability to coordinate the movements required for normal walking. Gait ataxia is characteirzed by a wide-based staggering gait with a tendency to fall.
Broad-based gait
MedGen UID:
167799
Concept ID:
C0856863
Finding
An abnormal gait pattern in which persons stand and walk with their feet spaced widely apart. This is often a component of cerebellar ataxia.
Delayed gross motor development
MedGen UID:
332508
Concept ID:
C1837658
Finding
A type of motor delay characterized by a delay in acquiring the ability to control the large muscles of the body for walking, running, sitting, and crawling.
Cerebellar vermis hypoplasia
MedGen UID:
333548
Concept ID:
C1840379
Finding
Underdevelopment of the vermis of cerebellum.
Nonprogressive cerebellar ataxia
MedGen UID:
335079
Concept ID:
C1845029
Finding
Motor delay
MedGen UID:
381392
Concept ID:
C1854301
Finding
A type of Developmental delay characterized by a delay in acquiring motor skills.
Diffuse cerebellar atrophy
MedGen UID:
343184
Concept ID:
C1854699
Finding
Diffuse unlocalised atrophy affecting the cerebellum.
Truncal titubation
MedGen UID:
382380
Concept ID:
C2674512
Finding
Tremor of the trunk in an anterior-posterior plane at 3-4 Hz.
Impaired tandem gait
MedGen UID:
476998
Concept ID:
C3275367
Finding
Reduced ability to walk in a straight line while placing the feet heel to toe.
Intention tremor
MedGen UID:
1642960
Concept ID:
C4551520
Sign or Symptom
A type of kinetic tremor that occurs during target directed movement is called intention tremor. That is, an oscillatory cerebellar ataxia that tends to be absent when the limbs are inactive and during the first part of voluntary movement but worsening as the movement continues and greater precision is required (e.g., in touching a target such as the patient's nose or a physician's finger).
Hypotonia
MedGen UID:
10133
Concept ID:
C0026827
Finding
Hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle). Even when relaxed, muscles have a continuous and passive partial contraction which provides some resistance to passive stretching. Hypotonia thus manifests as diminished resistance to passive stretching. Hypotonia is not the same as muscle weakness, although the two conditions can co-exist.
Nystagmus
MedGen UID:
45166
Concept ID:
C0028738
Disease or Syndrome
Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms.
Gaze-evoked nystagmus
MedGen UID:
1808161
Concept ID:
C5574666
Disease or Syndrome
Nystagmus made apparent by looking to the right or to the left.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVSpinocerebellar ataxia type 29
Follow this link to review classifications for Spinocerebellar ataxia type 29 in Orphanet.

Professional guidelines

PubMed

Zaltzman R, Sharony R, Klein C, Gordon CR
J Neurol 2016 Nov;263(11):2207-2214. Epub 2016 Aug 8 doi: 10.1007/s00415-016-8251-8. PMID: 27502086
Pareyson D, Gellera C, Castellotti B, Antonelli A, Riggio MC, Mazzucchelli F, Girotti F, Pietrini V, Mariotti C, Di Donato S
J Neurol 1999 May;246(5):389-93. doi: 10.1007/s004150050369. PMID: 10399872

Recent clinical studies

Etiology

Zambonin JL, Bellomo A, Ben-Pazi H, Everman DB, Frazer LM, Geraghty MT, Harper AD, Jones JR, Kamien B, Kernohan K, Koenig MK, Lines M, Palmer EE, Richardson R, Segel R, Tarnopolsky M, Vanstone JR, Gibbons M, Collins A, Fogel BL; Care4Rare Canada Consortium, Dudding-Byth T, Boycott KM
Orphanet J Rare Dis 2017 Jun 28;12(1):121. doi: 10.1186/s13023-017-0672-7. PMID: 28659154Free PMC Article

Diagnosis

Tolonen JP, Parolin Schnekenberg R, McGowan S, Sims D, McEntagart M, Elmslie F, Shears D, Stewart H, Tofaris GK, Dabir T, Morrison PJ, Johnson D, Hadjivassiliou M, Ellard S, Shaw-Smith C, Znaczko A, Dixit A, Suri M, Sarkar A, Harrison RE, Jones G, Houlden H, Ceravolo G, Jarvis J, Williams J, Shanks ME, Clouston P, Rankin J, Blumkin L, Lerman-Sagie T, Ponger P, Raskin S, Granath K, Uusimaa J, Conti H, McCann E, Joss S, Blakes AJM, Metcalfe K, Kingston H, Bertoli M, Kneen R, Lynch SA, Martínez Albaladejo I, Moore AP, Jones WD; Genomics England Research Consortium, Becker EBE, Németh AH
Mov Disord 2024 Jan;39(1):141-151. Epub 2023 Nov 14 doi: 10.1002/mds.29651. PMID: 37964426Free PMC Article
Casey JP, Hirouchi T, Hisatsune C, Lynch B, Murphy R, Dunne AM, Miyamoto A, Ennis S, van der Spek N, O'Hici B, Mikoshiba K, Lynch SA
J Neurol 2017 Jul;264(7):1444-1453. Epub 2017 Jun 15 doi: 10.1007/s00415-017-8545-5. PMID: 28620721

Prognosis

Zambonin JL, Bellomo A, Ben-Pazi H, Everman DB, Frazer LM, Geraghty MT, Harper AD, Jones JR, Kamien B, Kernohan K, Koenig MK, Lines M, Palmer EE, Richardson R, Segel R, Tarnopolsky M, Vanstone JR, Gibbons M, Collins A, Fogel BL; Care4Rare Canada Consortium, Dudding-Byth T, Boycott KM
Orphanet J Rare Dis 2017 Jun 28;12(1):121. doi: 10.1186/s13023-017-0672-7. PMID: 28659154Free PMC Article

Clinical prediction guides

Zambonin JL, Bellomo A, Ben-Pazi H, Everman DB, Frazer LM, Geraghty MT, Harper AD, Jones JR, Kamien B, Kernohan K, Koenig MK, Lines M, Palmer EE, Richardson R, Segel R, Tarnopolsky M, Vanstone JR, Gibbons M, Collins A, Fogel BL; Care4Rare Canada Consortium, Dudding-Byth T, Boycott KM
Orphanet J Rare Dis 2017 Jun 28;12(1):121. doi: 10.1186/s13023-017-0672-7. PMID: 28659154Free PMC Article

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